Relative Permitttivity & Relative Permeability Dependency

I want to know that is there anyway to relate the relative permittivity (εr) & relative permeability (μr) ???... I am having relative permittivity of an material & i want to find out its relative permeability ...

if v (= c/n) is the phase velocity of electromagnetic radiation in the material, then …

ε = εrεo

µ = µrµo

εµ = 1/v2​

so εrµr = 1/εoµov2 = (c/v)2

Hi Tiny-tim ...
Thank You for your reply ...
Yeah, your answer is giving me the relation but if i don't know the 'v' (Phase Velocity of EM radiation) then do this problem has any method ???...
Please ....

Thankyou tiny-tim ...
I got the answer ...
But a general question that really all the materials posses all these properties ...
The Parameters are,
1. Relative Permittivity,
2. Relative Permeability,
3. Refractive index.